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Title:

LABORATORY MEASUREMENT OF PERMEABILITY OF COMPACTED ASPHALT MIXTURES

Accession Number:

00185294

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

An improved method for measuring the permeability of compacted asphalt mixtures in the laboratory was developed. It eliminates the difficulties encountered with using a rubber membrane for sealing the specimen in a metal cylinder. In the new method, the specimen wall is coated with a one-part silicone rubber sealer that is applied as a paste with a spatula and is permanently flexible and waterproof. After the coating has cured and been checked for leaks, a known pressure difference is created by a vacuum across the specimen. The rate of air flow through the specimen is obtained at various differential pressure values. Flow rate is plotted against pressure difference, and the slope of the straight line portion of the curve is calculated. Permeability is calculated by using this slope value and the specimen height. The technique measures the true permeability, eliminates the possibility of specimen deformation during testing and the problems associated with other methods, permits no asphalt contamination, and is versatile with respect to aggregate gradation and asphalt grade. /Author/

Supplemental Notes:

Publication of this paper sponsored by Committee on Characteristics of Bituminous Paving Mixtures to Meet Structural Requirements. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

Monograph Accession #:

01410995

Authors:

Kumar, Arun
Goetz, W H

Pagination:

pp 37-43

Publication Date:

1977

Serial:

Transportation Research Record

Issue Number: 659
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309026881

Media Type:

Digital/other

Features:

Figures (18) ; Photos; References (11) ; Tables (3)

Uncontrolled Terms:

Air flow

Subject Areas:

Highways; Materials

Files:

TRIS, TRB

Created Date:

Jan 13 1979 12:00AM

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